Add Postfix for email sending

group_vars/all/vars.yml

@@ -1,9 +1,9 @@
 # vim: ft=yaml.ansible
 ---
 ssh_key: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPd/4fQV7CL8/KVwbo/phiV5UdXFBIDlkZ+ps8C7FeRf
-
 hostname: pi
 timezone: Europe/Copenhagen
+base_domain: sapti.me
 
 hdd_name: storage
 hdd_mount_point: /opt/{{ hdd_name }}

roles/docker_services/defaults/main.yml

@@ -1,6 +1,5 @@
 # vim: ft=yaml.ansible
 ---
-base_domain: sapti.me
 base_volume: "{{ hdd_mount_point }}/apps"
 
 services:
@@ -8,6 +7,11 @@ services:
     volume: "{{ base_volume }}/caddy"
     version: 2-alpine
 
+  postfix:
+    volume: "{{ base_volume }}/postfix"
+    hostname: smtp.{{ base_domain }}
+    version: latest-alpine
+
   emby:
     domain: watch.{{ base_domain }}
     volume: "{{ base_volume }}/emby"
@@ -38,3 +42,6 @@ services:
 
   watchtower:
     version: arm64v8-1.5.1
+
+sender_domains:
+  - "{{ services.nextcloud.domain }}"

roles/docker_services/tasks/services/nextcloud.yml

@@ -76,6 +76,7 @@
             PHP_UPLOAD_LIMIT: 16G
           networks:
             default:
+            postfix:
             services:
               aliases:
                 - nextcloud
@@ -88,5 +89,7 @@
             - redis
 
       networks:
+        postfix:
+          external: true
         services:
           external: true

roles/docker_services/tasks/services/postfix.yml

@@ -0,0 +1,26 @@
+# vim: ft=yaml.ansible
+---
+- name: Create Docker network for Postfix
+  docker_network:
+    name: postfix
+
+- name: Create Postfix volume directories
+  file:
+    name: "{{ services.postfix.volume }}/dkim"
+    owner: root
+    mode: u=rwx,g=rx,o=rx
+    state: directory
+
+- name: Deploy Postfix Docker container
+  docker_container:
+    name: postfix
+    image: boky/postfix:{{ services.postfix.version }}
+    restart_policy: always
+    env:
+      ALLOWED_SENDER_DOMAINS: "{{ sender_domains | join(' ') }}"
+      HOSTNAME: "{{ services.postfix.hostname }}"
+      DKIM_AUTOGENERATE: "true"
+    networks:
+      - name: postfix
+    volumes:
+      - "{{ services.postfix.volume }}/dkim:/etc/opendkim/keys:rw"